☆ 4.6 Article

Spurious Correlations between Galaxies and Multiepoch Image Stacks in the DESI Legacy Surveys

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2023)

相关参考文献

注意：仅列出部分参考文献，下载原文获取全部文献信息。

Article Astronomy & Astrophysics

Dark Energy Survey Year 3 Results: Measuring the Survey Transfer Function with Balrog

S. Everett et al.

Summary: We introduce an updated calibration and diagnostic framework, Balrog, for evaluating the Dark Energy Survey data set. By injecting millions of realistic galaxy models and analyzing them with the original data, we obtain an object catalog representing the DES transfer function, which serves as an important diagnostic and calibration tool. Our results show that the colors of Y3 are well calibrated, but there are noticeable size biases in a small subset of objects.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Angular clustering properties of the DESI QSO target selection using DR9 Legacy Imaging Surveys

Edmond Chaussidon et al.

Summary: The study aims to validate and improve the quasar target selection for DESI, using machine learning algorithms and conducting independent analysis in different photometric regions. The research shows similar correlation levels between DESI quasar targets and SDSS quasars in most regions, with excess correlation in some areas due to stellar contamination that should be mitigated with DESI spectroscopic data. The Limber parameters are derived for the three imaging regions and compared to previous measurements.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Dark Energy Survey Year 3 results: galaxy clustering and systematics treatment for lens galaxy samples

M. Rodriguez-Monroy et al.

Summary: This work presents galaxy clustering measurements of two DES lens galaxy samples and discusses the data analysis methods used. The results are combined with other measurements to place cosmological constraints.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

添加到收藏夹

Article Astronomy & Astrophysics

GOLDRUSH. IV. Luminosity Functions and Clustering Revealed with ∼4,000,000 Galaxies at z ∼ 2-7: Galaxy-AGN Transition, Star Formation Efficiency, and Implication for Evolution at z > 10

Yuichi Harikane et al.

Summary: This study presents new measurements of rest-UV luminosity functions and angular correlation functions of galaxies at redshifts around 2-7. The findings confirm previous studies and reveal the existence of a bright-end excess in the galaxy luminosity function, possibly attributed to inefficient mass quenching, low dust obscuration, and/or hidden AGN activity. Additionally, the study shows a weak redshift evolution in the ratio of star formation rate to dark matter accretion rate, which will be further tested by the James Webb Space Telescope.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

添加到收藏夹

Article Astronomy & Astrophysics

KiDS and Euclid: Cosmological implications of a pseudo angular power spectrum analysis of KiDS-1000 cosmic shear tomography

A. Loureiro et al.

Summary: This paper presents a tomographic weak lensing analysis of the KiDS-1000 survey, using a new pseudo-angular power spectrum estimator. The analysis provides constraints on cosmological parameters, which are consistent with previous measurements and confirm a tension with early-Universe constraints.

ASTRONOMY & ASTROPHYSICS (2022)

添加到收藏夹

Article Astronomy & Astrophysics

Organised randoms: Learning and correcting for systematic galaxy clustering patterns in KiDS using self-organising maps

Harry Johnston et al.

Summary: A new method for mitigating observational systematic effects in angular galaxy clustering is proposed, involving the use of corrective random galaxy catalogues. These organised randoms effectively eliminate spurious density modes from the two-point angular correlation function, correcting biases and showing promising performance for clustering analyses of faint samples. Each organised random object carries the properties of a real galaxy and is distributed throughout the survey footprint, making sub-sample randoms readily derived and extremely useful for current and future clustering analyses.

ASTRONOMY & ASTROPHYSICS (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Linear systematics mitigation in galaxy clustering in the Dark Energy Survey Year 1 Data

Erika L. Wagoner et al.

Summary: A linear model is implemented to mitigate the effects of observing conditions and contamination in galaxy clustering analyses, with four crucial improvements made to the existing systematics treatment. These improvements include characterizing uncertainties, leveraging spatial structure, and fully automating the process. The updated correlation function has minimal impact on cosmological constraints, but the method significantly improves the goodness-of-fit statistic for the DES Y1 3 x 2pt data set.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Baryon acoustic oscillations in the projected cross-correlation function between the eBOSS DR16 quasars and photometric galaxies from the DESI Legacy Imaging Surveys

Pauline Zarrouk et al.

Summary: The study focuses on searching for baryon acoustic oscillations through the projected cross-correlation function and addresses limitations related to imaging depth and performance of the method by utilizing a neural network approach. The cross-correlation function can provide better constraints on comoving angular distance compared to spherically averaged distance, showing potential for improvement with deeper photometric data in future surveys.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Mitigating contamination in LSS surveys: a comparison of methods

Noah Weaverdyck et al.

Summary: The text discusses the meticulous treatment of systematic contamination in large-scale structure surveys, comparing existing methods for removing systematics from galaxy clustering measurements and suggesting improved estimators. It also explores methods to generate clean maps and reduce errors in power spectra, proposing two new mitigation methods. The performance of these methods is tested on simulated measurements, resulting in improved maps and power spectra with minimal user tuning, providing recommendations for systematics mitigation in future surveys.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Dark energy survey year 3 results: weak lensing shape catalogue

M. Gatti et al.

Summary: This study presents and characterizes the galaxy shape catalogue from the first 3 years of Dark Energy Survey (DES) observations, covering an effective area of 4143 deg(2) of the southern sky. The catalogue consists of 100,204,026 galaxies measured in the riz bands, with a weighted source number density of n(eff) = 5.59 gal arcmin(-2) and shape noise sigma(e) = 0.261. The study also includes internal null tests on the catalogue to check for systematics and other factors.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

添加到收藏夹

Article Astronomy & Astrophysics

Primordial non-Gaussianity from the completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey - I: Catalogue preparation and systematic mitigation

Mehdi Rezaie et al.

Summary: In this study, the large-scale clustering of the final spectroscopic sample of quasars from eBOSS is investigated using a neural network-based approach to mitigate spurious fluctuations caused by spatial variations in imaging data quality. Simulations with similar distributions to real data were used to estimate covariance matrices and assess residual uncertainties, with the study finding that a new template based on data from the Gaia spacecraft provides the best match to observed quasar clustering.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

添加到收藏夹

Article Astronomy & Astrophysics

An all-sky proper-motion map of the Sagittarius stream using Gaia DR2

T. Antoja et al.

ASTRONOMY & ASTROPHYSICS (2020)

添加到收藏夹

Article Astronomy & Astrophysics

Improving galaxy clustering measurements with deep learning: analysis of the DECaLS DR7 data

Mehdi Rezaie et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

添加到收藏夹

Article Astronomy & Astrophysics

Imaging systematics and clustering of DESI main targets

Ellie Kitanidis et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

添加到收藏夹

Article Astronomy & Astrophysics

Optimizing LSST observing strategy for weak lensing systematics

Husni Almoubayyed et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

添加到收藏夹

Article Astronomy & Astrophysics

A unified pseudo-Cl framework

David Alonso et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Overview of the DESI Legacy Imaging Surveys

Arjun Dey et al.

ASTRONOMICAL JOURNAL (2019)

添加到收藏夹

Article Astronomy & Astrophysics

Characterization and photometric performance of the Hyper Suprime-Cam Software Pipeline

Song Huang et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN (2018)

添加到收藏夹

Article Astronomy & Astrophysics

GOLDRUSH. II. Clustering of galaxies at z ∼ 4-6 revealed with the half-million dropouts over the 100 deg2 area corresponding to 1 Gpc3

Yuichi Harikane et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN (2018)

添加到收藏夹

Article Astronomy & Astrophysics

Gaia Data Release 2. Summary of the contents and survey properties

A. G. A. Brown et al.

ASTRONOMY & ASTROPHYSICS (2018)

添加到收藏夹

Article Astronomy & Astrophysics

Photometric Calibration for the Beijing-Arizona Sky Survey and Mayall z-band Legacy Survey

Zhimin Zhou et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC (2018)

添加到收藏夹

Article Astronomy & Astrophysics

Gaia Data Release 2. Summary of the contents and survey properties

A. G. A. Brown et al.

ASTRONOMY & ASTROPHYSICS (2018)

添加到收藏夹

Article Astronomy & Astrophysics

Project Overview of the Beijing-Arizona Sky Survey

Hu Zou et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC (2017)

添加到收藏夹

Article Astronomy & Astrophysics

Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations

A. M. Meisner et al.

ASTRONOMICAL JOURNAL (2017)

添加到收藏夹

Article Astronomy & Astrophysics

Unbiased methods for removing systematics from galaxy clustering measurements

Franz Elsner et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2016)

添加到收藏夹

Article Astronomy & Astrophysics

HI4PI: a full-sky H I survey based on EBHIS and GASS

N. Ben Bekhti et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Article Astronomy & Astrophysics

HI4PI: a full-sky H I survey based on EBHIS and GASS

N. Ben Bekhti et al.

ASTRONOMY & ASTROPHYSICS (2016)

添加到收藏夹

Proceedings Paper Astronomy & Astrophysics

Mosaic3: A red-sensitive upgrade for the prime focus camera at the Mayall 4m telescope

Arjun Dey et al.

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VI (2016)

添加到收藏夹

Article Astronomy & Astrophysics

TESTING LSST DITHER STRATEGIES FOR SURVEY UNIFORMITY AND LARGE-SCALE STRUCTURE SYSTEMATICS

Humna Awan et al.

ASTROPHYSICAL JOURNAL (2016)

添加到收藏夹

Article Astronomy & Astrophysics

Multiplicative errors in the galaxy power spectrum: self-calibration of unknown photometric systematics for precision cosmology

Daniel L. Shafer et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2015)

添加到收藏夹

Article Astronomy & Astrophysics

Ameliorating systematic uncertainties in the angular clustering of galaxies: a study using the SDSS-III

Ashley J. Ross et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2011)

添加到收藏夹

Article Astronomy & Astrophysics

THE WIDE-FIELD INFRARED SURVEY EXPLORER (WISE): MISSION DESCRIPTION AND INITIAL ON-ORBIT PERFORMANCE

Edward L. Wright et al.

ASTRONOMICAL JOURNAL (2010)

添加到收藏夹

Article Astronomy & Astrophysics

CARS: the CFHTLS-Archive-Research Survey II. Weighing dark matter halos of Lyman-break galaxies at z=3-5

H. Hildebrandt et al.

ASTRONOMY & ASTROPHYSICS (2009)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.